12 May 2009 :

two men who were juveniles at the time of their alleged crimes were beheaded by Saudi Arabian authorities on May 10, 2009, Amnesty International revealed.
“The death sentences against Sultan Bin Sulayman Bin Muslim al-Muwallad, a Saudi Arabian, and ‘Issa bin Muhammad ‘Umar Muhammad, a Chadian, were imposed after grossly unfair trial proceedings,” Philip Luther, Deputy Director of the Middle East and North Africa Programme.
The two men were beheaded, along with three other men, after being convicted of a number of offences committed when they were 17 years old.